#include <iostream>
#include <vector>

struct student
{
    void SetA(int num)
    {
        a = num;
    }
    int a;
    int b;
};
// using stu = student;
// typedef student stu;

int main()
{
    student s;
    s.SetA(10);
    std::cout<<s.a<<std::endl;
  
    #if 1
    std::vector<int> a;
    #endif
    
    return 0;
}